mirror of https://github.com/rust-lang/rust
47 lines
785 B
Rust
47 lines
785 B
Rust
//@ run-pass
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//@ revisions: stock precise
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#![allow(unused)]
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#![cfg_attr(precise, feature(const_precise_live_drops))]
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// `x` is always moved into the final value and is not dropped inside the initializer.
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const _: Option<Vec<i32>> = {
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let y: Option<Vec<i32>> = None;
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let x = Some(Vec::new());
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if true {
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x
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} else {
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x
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}
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};
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const _: Option<Vec<i32>> = {
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let x = Some(Vec::new());
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match () {
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() => x,
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}
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};
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const _: Option<Vec<i32>> = {
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let mut some = Some(Vec::new());
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let mut tmp = None;
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let mut i = 0;
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while i < 10 {
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tmp = some;
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some = None;
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// We can never exit the loop with `Some` in `tmp`.
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some = tmp;
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tmp = None;
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i += 1;
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}
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some
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};
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fn main() {}
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